Please see the logs below
org.alfresco.repo.search.impl.lucene.LuceneQueryParserException: 07190031 Request failed 401 /solr4/alfresco/afts?wt=json&fl=DBID%2Cscore&rows=25&df=keywords&start=0&locale=en_US&alternativeDic=DEFAULT_DICTIONARY&fq=%7B%21afts%7DAUTHORITY_FILTER_FROM_JSON&fq=%7B%21afts%7DTENANT_FILTER_FROM_JSON&facet=true&facet.field=%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreator&f.%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreator.facet.limit=100&facet.field=%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.mimetype&f.%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.mimetype.facet.limit=100&facet.field=%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodifier&f.%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodifier.facet.limit=100&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.size%3A%5B0+TO+10240%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.size%3A%5B10240+TO+102400%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.size%3A%5B102400+TO+1048576%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.size%3A%5B1048576+TO+16777216%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.size%3A%5B16777216+TO+134217728%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcontent.size%3A%5B134217728+TO+MAX%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreated%3A%5BNOW%2FDAY-1DAY+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreated%3A%5BNOW%2FDAY-7DAYS+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreated%3A%5BNOW%2FDAY-1MONTH+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreated%3A%5BNOW%2FDAY-6MONTHS+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dcreated%3A%5BNOW%2FDAY-1YEAR+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodified%3A%5BNOW%2FDAY-1DAY+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodified%3A%5BNOW%2FDAY-7DAYS+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodified%3A%5BNOW%2FDAY-1MONTH+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodified%3A%5BNOW%2FDAY-6MONTHS+TO+NOW%2FDAY%2B1DAY%5D&facet.query=%7B%21afts%7D%40%7Bhttp%3A%2F%2Fwww.alfresco.org%2Fmodel%2Fcontent%2F1.0%7Dmodified%3A%5BNOW%2FDAY-1YEAR+TO+NOW%2FDAY%2B1DAY%5D&spellcheck.q=a&spellcheck=true
at org.alfresco.repo.search.impl.solr.SolrQueryHTTPClient.postQuery(SolrQueryHTTPClient.java:616)
